One antagonist could be Orochimaru from Naruto's world. He could be interested in the power of Quirks in Deku's world and try to capture Deku to study his power. He would be a formidable foe as he is a master of ninjutsu and has a lot of devious plans.
One possible plot could be Naruto and Deku finding themselves in a strange new world together. They have to combine their unique skills, Naruto's ninjutsu and Deku's One For All power, to face the challenges of this world and find a way back home.
Naruto's outgoing and boisterous personality would make Deku more confident. He would probably be more upfront and less shy. Naruto's strong sense of justice would also intensify Deku's already existing desire to help others.
One key element is the resolution of their past conflicts. Since they had a lot of rivalry in the original story, in a friends - based fanfic, they need to address those issues. For example, Bakugou realizing his wrong attitude towards Deku.
In a fanfiction where Naruto is reborn as Deku, there would be a lot of potential for unique storylines. Naruto's experience with facing powerful enemies in the Naruto world could give Deku an edge. He might be more aggressive in battles compared to the original Deku. Also, Naruto's ability to make friends and form bonds could strengthen Deku's relationships with his classmates even further. And his understanding of power and how to grow stronger could lead to a faster development of Deku's abilities.
I think it's a toss-up. Deku has potential and is constantly evolving, but Naruto's strength and strategic thinking give him an edge. It could come down to the specific circumstances of the fight.
In a fanfiction where Naruto and Madara are friends, it could completely change the Naruto storyline. Their friendship might start from a mutual understanding of their strong wills. Naruto, with his belief in redemption, could see past Madara's actions. And Madara, who has been alone for so long, might be drawn to Naruto's positive energy.
One way for Naruto and Ibiki to be friends in a fanfiction could be through a shared love for the village. Ibiki, who has dedicated his life to protecting Konoha, sees Naruto's potential to be a great protector. Naruto, in turn, admires Ibiki's loyalty. They often meet in secret to exchange stories about their ninja lives, and over time, this connection deepens into a strong friendship.
You could start by sharing your enthusiasm for the fanfiction and explaining why you think it's so great. Maybe talk about the unique storylines or interesting character developments.
One way could be to have the characters share common interests or goals related to the Naruto universe. This can naturally bring them together and start a friendship.